Geochronological cross section through northern Thailand

Ahrendt, H.; Chonglakmani, Chongpan; Hansen, Bent; Helmcke, Dietrich

doi:10.1016/0743-9547(93)90022-h

Cited by 50 publications

(28 citation statements)

References 7 publications

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“…5a shows a plot of εHf versus inferred crystallization age for these samples. In northern Thailand, the Main Range granites exhibit a similar age span of 200-220 Ma (Ahrendt et al, 1993;Charusiri et al, 1993;Dunning et al, 1995;Ahrendt et al, 1997;Palin et al, 2013). The Nang Lae Unit, part of the Chiang Rai Batholith, was dated using Rb-Sr whole-rock methodology at 200 ± 10 Ma (Cobbing et al, 1992).…”

Section: Resultsmentioning

confidence: 99%

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The closure of Palaeo-Tethys in Eastern Myanmar and Northern Thailand: New insights from zircon U–Pb and Hf isotope data

et al. 2016

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Section: Resultsmentioning

confidence: 99%

“…The minor younger peak at 1600 Ma reported by Chen The horizontal line shows our assumed age of PalaeoTethys suturing. Data form Ahrendt et al (1993Ahrendt et al ( , 1997, Barley et al (2003), Barley and Khin Zaw (2009), Barr et al (2000Barr et al ( , 2006 (Fig. 5b).…”

Section: Northern Extension Of Sibumasumentioning

confidence: 96%

The closure of Palaeo-Tethys in Eastern Myanmar and Northern Thailand: New insights from zircon U–Pb and Hf isotope data

et al. 2016

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“…Other geochronological studies using both Ar/Ar and U-Pb methodologies have assigned a general age range of 220-200 Ma for granites from the Main Range Province (e.g., Ahrendt et al, 1993, Charusiri et al, 1993and Ng et al, 2015b, ages interpreted as reflecting magmatism related to the suturing of Palaeo-Tethys, and the subsequent onset of the Indosinian orogeny. Our zircon ages from both Doi Inthanon and Doi Suthep range from 221-210 Ma, and are in accord with these data.…”

Section: Indosinian Magmatic Protolithmentioning

confidence: 99%

Did Oligocene crustal thickening precede basin development in northern Thailand? A geochronological reassessment of Doi Inthanon and Doi Suthep

Gardiner

Morley

Searle

et al. 2016

Lithos

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The Doi Inthanon and Doi Suthep metamorphic core complexes in northern Thailand are comprised of amphibolite-grade migmatitic gneisses mantled by lower-grade mylonites and metasedimentary sequences, thought to represent Cordilleran-style core complexes exhumed through the mobilization of a low-angle detachment fault. Previous studies have interpreted two metamorphic events (Late Triassic and Late Cretaceous), followed by ductile extension between the late Eocene and late Oligocene, a model which infers movement on the detachment at ca. 40 Ma, and which culminates in a rapid unroofing of the complexes in the early Miocene. The Chiang Mai Basin, the largest such Cenozoic Basin in the region, lies immediately to the east. Its development is related to the extension observed at Doi Inthanon and Doi Suthep, however it is not definitively dated, and models for its development have difficulty reconciling Miocene cooling ages with Eocene detachment movement. Here we present new in-situ LA-ICP-MS and SIMS U-Pb age data of zircon and monazite grains from gneiss and leucogranite samples taken from Doi Inthanon and Doi Suthep. Our new zircon data exhibit an older age range of 221-210 Ma, with younger ages of ca. 72 Ma, and 32-26 Ma. Our monazite data imply an older age cluster at 83-67 Ma, and a younger age cluster of 34-24 Ma. While our data support the view of Indosinian basement being reworked in the Cretaceous, they also indicate a late Eocene-Oligocene tectonothermal event, resulting in prograde metamorphism and anatexis. We suggest that this later event is related to localized transpressional thickening associated with sinistral movement on the Mae Ping Fault, coupled with thickening at the restraining bend of the Mae Yuan Fault to the immediate west of Doi Inthanon. Further, this upper Oligocene age limit from our zircon and monazite data would imply a younger Miocene constraint on movement of the detachment, which, when combined with the previously recorded Miocene cooling ages, has implications for a model for the onset of extension and subsequent development of the Chiang Mai Basin in the early mid-Miocene.

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“…However, the age dating of the Mae Ping Fault zone at 29-31 Ma (Lacassin et al, 1997;Ahrendt et al 1993Ahrendt et al , 1994Ahrendt et al , 1997 may be the closest related events. The northward movement of the Australian-Indian plate and collision with the Eurasian plate, and the westward subduction of the Pacific plate, are suspected to be two major causes of the splitting and pushing of the northern Thailand segment southwestward along the Sakiang, Mae Ping and Red River Fault zones.…”

Section: Isotopic Analysismentioning

confidence: 99%

Paleaogeography and Climatic Change recorded on Viviparidae Carbon and Oxygen Isotope in Mae Moh Coal Mine, Northern Thailand

Ratanasthien

Takashima

Matsubaya

2009

Bull. Geol. Surv. Japan

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Viviparidae fossil collected from the R-, Q-, and K-coal zones of the Mae Moh coal mine, northern Thailand were analyzed for 13 Carbon and 18 Oxygen isotopes at Akita University, Japan. The result reveals that Viviparidae of the lower part of the coal mine contribute much heavier carbon isotopes than the upper part. The results revealed that Viviparidae shell O ‰ value between -6.64 to -7.04 ‰ PDB. The isotopic results of Viviparidae fossil shells from Mae Moh basin show the gradually change from the R-coal zone to the Q-, and the K-coal zone and significantly different from the Recent Viviparidae in the area. The heavy carbon isotopes in the R-coal zone could imply a much cooler climate than during the Q-and K-coal zone depositing period and the area were more close to the sea. The climatic condition during the Q-and K-coal zone depositing period was warmer and at a geographically higher elevation or latitude than during depositing the R-coal zone. The changing records in Mae Moh coal field are confirmed by temperate fossils in the other Oligocene to Lower Miocene basins in Northern Thailand. The change to a more tropical climate could have occurred during the Middle Miocene period, as indicated by paleomagnetic age dating in the K-and Q-coal zone. The northward movement of the Australian-Indian plate and collision with the Eurasian plate are suspected to be the main cause of the change.

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Geochronological cross section through northern Thailand

Cited by 50 publications

References 7 publications

The closure of Palaeo-Tethys in Eastern Myanmar and Northern Thailand: New insights from zircon U–Pb and Hf isotope data

The closure of Palaeo-Tethys in Eastern Myanmar and Northern Thailand: New insights from zircon U–Pb and Hf isotope data

Did Oligocene crustal thickening precede basin development in northern Thailand? A geochronological reassessment of Doi Inthanon and Doi Suthep

Paleaogeography and Climatic Change recorded on Viviparidae Carbon and Oxygen Isotope in Mae Moh Coal Mine, Northern Thailand

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